Hello,
The Easysocial user export will often fail for large sites (many thousands of users). Usually, it's due to extremely long execution time requirements or memory requirement to finish the process. Would you consider another method for exporting rather than trying to complete it in a single page load? I actually use this to perform stats on the community, To do it, I am forced to download the whole site, and perform on my localhost where I can control the resource requirements.
Jordan